[][kernel][common][hnat][Fix the conditions for NAT66 binding]

[Description]
Fix the conditions for NAT66 binding.
In the NAT66 scenario, packets forwarding was interrupted due to
incorrect binding HNAT entry on Panther/Cheetah.

This patch fix it.

[Release-log]
N/A


Change-Id: Ic632388095e0e8971ac04c8c7aee54204ead3c03
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7420417
1 file changed